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#include <Message_ProgressScale.ixx>
static const Standard_Real ZERO = 1e-10;
static const Standard_Real INFINITE = 1e100;
//=======================================================================
//function : Message_ProgressScale
//purpose :
//=======================================================================
Message_ProgressScale::Message_ProgressScale () :
myMin(0.), myMax(100.), myStep(1.), myInfinite(Standard_False),
myFirst(0.), myLast(1.)
{
}
//=======================================================================
//function : LocalToBase
//purpose :
//=======================================================================
Standard_Real Message_ProgressScale::LocalToBase (const Standard_Real val) const
{
if ( val <= myMin ) return myFirst;
if ( myMax - myMin <= ZERO ) return myLast;
if ( ! myInfinite ) {
if ( val >= myMax ) return myLast;
return myFirst + ( myLast - myFirst ) * ( val - myMin ) / ( myMax - myMin );
}
Standard_Real x = ( val - myMin ) / ( myMax - myMin );
// return myFirst + ( myLast - myFirst ) * ( 1. - exp ( -x ) ); // exponent
return myFirst + ( myLast - myFirst ) * x / ( 1. + x ); // hyperbola
}
//=======================================================================
//function : BaseToLocal
//purpose :
//=======================================================================
Standard_Real Message_ProgressScale::BaseToLocal (const Standard_Real val) const
{
if ( myLast - val <= ZERO )
return myInfinite ? INFINITE : myMax;
if ( ! myInfinite )
return myMin + ( myMax - myMin ) * ( val - myFirst ) / ( myLast - myFirst );
// Standard_Real x = log ( ( val - myFirst ) / ( myLast - val ) ); // exponent
Standard_Real x = ( val - myFirst ) / ( myLast - val ); // hyperbola
return myMin + x * ( myMax - myMin );
}
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